Detective Constable Gordon Reid from Govan CID said: “This was a disgusting and cowardly attack on an elderly man who had been out enjoying an afternoon with his friends.

“In particular I would like to speak to a man who was seen getting off the bus after the victim, which had been travelling west from Govan Road. He is described as white, between 35 and 40 years old, with short dark hair and glasses. He was wearing a brown jacket, dark trousers, and was carrying shopping bags.

“I would also like to speak to the members of the public who went to the victim’s aid as they may have information that could assist with our enquiries.

“Anyone with information is asked to contact officers at Govan CID on 101. Alternatively you can call CRIMESTOPPERS on 0800 555 111 where details can be given in confidence.”